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Carry out the following operations in the given sequence:
1) Calibration of the maximum heat output. Check that the CO
at the maximum heat output, is the same as that shown in table 1. Otherwise, turn the regulation screw (V) on
the gas valve. Turn the screw clockwise to reduce the concentration of CO
) Calibration of reduced heat output. Check that the CO
the minimum heat output, is the same as that shown in table 1. Otherwise, turn the offset regulation screw
(K) on the gas valve. Turn the screw clockwise to reduce the concentration of CO
increase it.
pi:
Gas supply pressure connection point
pl:
Air signal input from fan
V:
Gas flow adjuster screw max fire
K:
OFFSET adjuster screw min fire
caution: in the event of the boiler failing to ignite, or when replacing the gas valve, the recommended
procedure is to tighten the adjuster screw (V) fully and then back off 1/ turns, repeating the steps
described above.
To simplify calibration of the gas valve, the "calibration function" can be set directly on the boiler control panel
by proceeding as follows:
1) Press the
keys (2-3) together until the display shows the pointer " " alongside the
(about 6 seconds) (see fig. 16).
2) Press the
keys to set the fan speed at the minimum and maximum heat output (%PWM);
N.b - to set the minimum and maximum heat output quickly, press the
3) press either of the two
Figure 1
InstructIons pErtaInInG to thE
15. gas valve adjustment
keys to exit the function.
InstaLLEr
1
measured on the flue, with the boiler operating
2
and anticlockwise to increase it.
2
measured on the flue, with the boiler operating at
2
Replace the gas nozzle in the case of con-
version from natural gas to propane (LPG)
V
Figure 15
and anticlockwise to
2
Pl
K
Pi
and
symbols
keys respectively;
91.550.1 - GB/IE
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